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monalisa
  • Member for 11 years, 7 months
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133 votes
10 answers
81k views

What's the difference between theorem, lemma and corollary?

25 votes
2 answers
35k views

If the Wronskian is zero at some point, does this imply linear dependency of functions?

12 votes
2 answers
3k views

Basic question about $\sup_{x\neq 0}{} \frac{\|Ax\|}{\|x\|} = \sup_{\|x\| = 1}{\|Ax\|} $, $x \in\mathbb{R}^n$

8 votes
2 answers
439 views

maximum number of edges to be removed to possess a property

8 votes
3 answers
12k views

Trees whose complement is also a tree

8 votes
3 answers
4k views

existence of disconnected, self-complementary graph

8 votes
1 answer
5k views

Why is the polynomial $2x^2 + 4$ reducible over $\mathbb{Z}$

7 votes
2 answers
8k views

difference between "minimal" and "minimum" edge cuts.

7 votes
3 answers
10k views

$\mathbb{Q}$ is not open, is not closed, but is the countable union of closed sets.

7 votes
3 answers
4k views

Largest order of an element in a group

7 votes
1 answer
2k views

If order of the element $a^5$ is 12 can we make any guess about the order of the element $a$ in a group $G$?

7 votes
4 answers
9k views

To show that function is constant [duplicate]

7 votes
1 answer
3k views

To calculate residue of the function $f(z) = \frac{z^2 + \sin z}{\cos z - 1}$.

6 votes
3 answers
2k views

book for metric spaces

6 votes
3 answers
5k views

Finding elements of order $8$ in $\mathbb{Z}_{8000000}$.

6 votes
1 answer
4k views

What exactly are graph invariants?

5 votes
2 answers
2k views

Definition/Clarification of Graph Embeddings

5 votes
1 answer
1k views

The graphs in which radius is equal to diameter

5 votes
1 answer
203 views

A small help needed in proving a smart part of a result - to show that we need at least 2r-3 vertices to construct a particular type of graph.

5 votes
2 answers
480 views

Any source to find distance between vertices in generalized Petersen graphs?

4 votes
7 answers
483 views

Undesrstanding a proof related to Fibonacci numbers.

4 votes
4 answers
222 views

$K\mid\frac{N}J\iff J\mid\frac{N}K\ $ [Divisor Reciprocity]

4 votes
2 answers
846 views

A graph with radius three and diameter four.

4 votes
3 answers
863 views

number of 8 x 8 matrices with specific conditions

4 votes
1 answer
244 views

to find the distance

4 votes
1 answer
180 views

a simple doubt in graph theory

4 votes
1 answer
1k views

inverse of a point $p$ respect to the circle $|z-z_0 |= r$ in complex

4 votes
0 answers
71 views

clarification of a doubt over a defined result in ODE

4 votes
1 answer
133 views

a question regarding wronskian

4 votes
4 answers
4k views

How to determine the order of a differential equation when it's solution is given

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